Zig: MacOS SDK for cross-compile

[kassane]

e.g.: Build Linux to MacOS (both x86_64)

Fix

zig build --summary all -Dtarget=native-macos
install
└─ install gc
   └─ zig build-lib gc Debug native-macos 1 errors
/home/kassane/bdwgc/extra/../os_dep.c:4453:10: error: 'mach/exception.h' file not found
#include <mach/exception.h>
         ^~~~~~~~~~~~~~~~~~~
/home/kassane/bdwgc/extra/gc.c:62:10: note: in file included from /home/kassane/bdwgc/extra/gc.c:62:
#include "../os_dep.c"
         ^

cc: @ivmai

Reference

• Add MacOS headers to get bdwgc to compile ziglang/zig#18257

[ivmai]

Please see commit 9eae294 - this is existing W/A for MacOS.
Is your solution another workaround or the right solution of the issue?

[ivmai]

Why do we need .zon file?

[kassane]

Why do we need .zon file?

Zig's package manager (since v0.11.0) requests zon as an additional way to port external packages to build.zig.

The biggest difference between the previous version and the latest v0.12.0 is that you no longer need to add build.zig to all external packages. You can now access the root_path of the packages and compile directly in the build.zig of the main project.

[kassane]

Please see commit 9eae294 - this is existing W/A for MacOS. Is your solution another workaround or the right solution of the issue?

remake & rebased!!

[ivmai]

BTW: Just in case you did not know of - https://github.com/lycus/libgc-d

[ivmai]

Merged.

[kassane]

BTW: Just in case you did not know of - https://github.com/lycus/libgc-d

I see. Just chose importC over manual binding.
Thanks for the reminder. I'll add it to the bdwgc-d readme for reference.

Merged.

Thanks, again!